<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>

  <div></div>

  <script>

    function updateView() { // compiler

    }

    // data() {
    //   return {
    //   }
    // }

    let Person = {}
    let temp = null
    Object.defineProperty(Person, 'name', {
      get: function () {
        return temp
      },
      set: function (val) {
        watcher(val)
        temp = val
      }
    })

    function watcher() {
      updateView()
    }

    Person.name = 'JACK'
    console.log(Person)



  </script>
</body>
</html>